Judd Apatow fans rejoice -- there's going to be a sequel to Knocked Up!! Well, sort of. Apatow's new film This Is 40 follows Paul Rudd's and Leslie Mann's Knocked Up characters Pete and Debbie a few years down the road. Check out the brand-new trailer!  

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Knocked Up stars Jason Segel and Charlene Yi are back, too, and joining them are Bridesmaids stars Melissa McCarthy and Chris O'Dowd. And even though they're not credited, I think the odds are pretty good that Katherine Heigl and Seth Rogen will make cameos in the film as well. How could they not, right?

Judging from the trailer, it looks like Pete and Debbie are in much better place in their marriage than they were during Knocked Up, but now they're facing a whole new set of troubles -- Debbie's freaking out at the prospect of turning 40. But I think we've all seen enough Judd Apatow movies by now to know that after all the trouble and silliness, it's going to end on a very touching, sweet note.

The only bummer? This is 40 doesn't open in theaters until December!

What is your favorite Judd Apatow movie?

Video courtesy of YouTube